Musical keyboard



FIG. 1 is a top, front, right perspective view of a musical keyboard showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left elevational view thereof; and,

FIG. 7 is a right elevational view thereof. 

The ornamental design for a musical keyboard, as shown. 